#define INTERVAL_SENSOR 1000    
#define INTERVAL_MOTOR 500      
  
unsigned long millisSensor = 0; 
unsigned long millisMotor = 0;  

#include <Servo.h>

Servo myservo;

int pos = 0;

const int buttonPin = 2;
const int ledPin = 13;

int buttonState = 0;

void setup() {  
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT);
  myservo.attach(9);
}

void loop() {
  unsigned long millisCurrent = 0;

  
  millisCurrent = millis();
  if (millisCurrent - millisMotor >= INTERVAL_MOTOR) {
    millisMotor = millisCurrent;
    processUpdateMotor();
  }
  
  buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH) {
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
  }
}



void processUpdateMotor() {
  for(pos = 0; pos <= 180; pos += 1) {
    myservo.write(pos);
    delay(15);
  }
  for(pos = 180; pos >= 0; pos -= 1) {
    myservo.write(pos);
    delay(15);
};
}